The supplies are used to re-activate the goblin defense turrets in the area. The supplies may be collected even while not on the daily quest, which is rather annoying because I had no context for what their purpose is nor any use for them since there are no turrets to repair if not on the quest.

It helps to enable friendly nameplates for this quest. It makes it easier to spot the Baby Goren. Default keybind is Shift+V. You can also go to Game Menu > Key Bindings > Targeting, scroll down to near bottom and set Show Friendly Name Plates to what you want.